[Bug 90085] Re: When /tmp is mounted noexec, preconfigure fails

[John Paul Adrian Glaubitz]

> Please let the user decide if using a /tmp noexec mount point is more
secure or not.

That doesn't even make sense. It's a fact that mounting /tmp with
"noexec" doesn't give you any extra security simply because you can
simply circumvent it by invoking the executable with the help of the
dynamic Linux loader.

Anyone who wants to run an exploit can just run "lib64/ld-
linux-x86-64.so.2 /tmp/bla" instead of just "/tmp/bla" and it will just
work. For scripts, you just invoke them through their interpreter.

Adrian

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https://bugs.launchpad.net/bugs/90085

Title:
  When /tmp is mounted noexec, preconfigure fails

Status in debconf package in Ubuntu:
  Triaged
Status in debconf package in Debian:
  Confirmed

Bug description:
  Binary package hint: mysql-server

  
  /tmp mounted noexec, this ensues:

  
  Preconfiguring packages ...
  Can't exec "/tmp/mysql-server-5.0.config.89611": Permission denied at /usr/share/perl/5.8/IPC/Open3.pm line 168.
  open2: exec of /tmp/mysql-server-5.0.config.89611 configure  failed at /usr/share/perl5/Debconf/ConfModule.pm line 57
  mysql-server-5.0 failed to preconfigure, with exit status 2

  ace

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